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"2 Sheets-She't 2 W. W. LAKE &-M. EQWBLLHE Machine forGrinding Glass,8L0.

No. 225,619. Patented Mame, I880.

Milli!" p" A "Ill"! INVENTORS 2 uww mw;

WITNESSES i UNITED STATES PATENT OFFICE,

WILLIAM W. LAKE AND MARVIN E. WELLER, OF FORT PLAIN, NEW YORK; SAID LAKEASSIGNOR OF ONE-HALF OF HIS RIGHT TO FRANK P. WEMPLE, OF SAME PLACE.

MACHINE FOR GRINDING GLASS, 840.

SPECIFICATION forming part of Letters Patent No. 225,619, dated March16, 1880.

Application filed February 9, 1880.

To all whom it may concern.-

Be it known that we, WILLIAM W. LAKE and MARVIN E. WELLER, of FortPlain, in the county of Montgomery and State of New York, have inventedcertain new and useful Improvements in Grinding and Polishing;

and we do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use it, reference being had to theaccompanying drawings, which form part of this specification.

Our invention relates more particularly to grinding and polishing hollowware.

, Heretofore, among the various processes employed for this purpose, theware has been held in upright position and partially filled with agrinding substance, said substance being then moved about within thehollow ware while the latter is held stationary; also, tubular metallicarticles have been moved in constant rotary direction while a grindingsubstance is discharged against their interior, said substance therebycollecting in the lower portion of the horizontal tubes, and necessarily exerting a greater or less polishing action upon the inner surfacesof the rotating tubes. The object of our invention is to provide animproved method of grinding and polishing, which has as its prominentfeature the reverse or alternating rotation of the hollow ware whilefilled with a grinding substance. This reversing rotation of the hollowware tends to cause the grinding mass, by reason'of its inertia, toremain stationary therein, this tendency varying in degree with the rateof movement of the hollow ware. The ware is therefore subjected to agrinding and polishing process, which is efiective and thorough, thework being quickly performed and the action being proportionately severewith the rapidity of the reversing rotation of the hollow ware. Themechanical means employed are adapted to brace and support the.hollowware while subjected to this treatment. By means of an independent ringplaced on the upper edge of the hollow ware the grinding substance canbe introduced into the latter above its top,

thereby causing the extreme end portion of the hollow ware to be actedupon by the stationary grinding mass.

The invention consists, first, in a process of filling hollow ware witha grinding substance, and then reciprocating the ware in rotarymovement; second, in the combination, with a rotary table adapted tosupport the hollow ware, of mechanism which reciprocates said table;third, in the combination, with a rotary table adapted to support thehollow ware and mechanism for reciprocating it, of an elastic stop whichreceives the impact of said table at the termination of its movement inone line of direction; fourth, in the combination, with a rotary tableadapted to support the hollow ware, said table being provided with oneor more lateral projections, of mechanism which reciprocates the table,and elastic stops located, respectively, on opposite sides of eachprojection in position to receive the impact thereof; fifth, in thecombination, with a rotary table and mechanism for reciprocating it, ofa clamp connected to said table and adapted to secure the hollow ware;sixth, in the combination, with a rotary table and mechanism forreciprocatin g it, of a two-part clamp connected to the table andadapted to embrace the hollow ware, the two parts of said clamp beinghinged together at one side and provided with a fastening device at theopposite side; seventh, in the combination, with a rotary table providedwith a clamp which embraces the hollow ware, of an independent ringfitted on the clamp and adapted to directly support the ware; eighth, inthe combination, with a rotary table provided with a clamp, of atwo-part ring fitted on the latter and directly supporting the hollowware, said ring being provided with slot or slots, and said clamp bcin gprovided with screw or headed projections, so that rings with difl'erentinside diameters can be quickly changed thereon to fit different sizesof ware; ninth, in the combination, with a rotary table provided with anadjustable clamp for maintaining difl'erent sizes of hollow ware inposition, of avertically-adj ustable support adapted to hold said warein position while being clamped; tenth, in the combination, with a ro-'tary table provided with a tubular shaft ex tending down ward throughsuitable bearings, of an internal rod, a plate secured to the upperextremity of the latter, and a lever connected to lower extremity of thesame; eleventh, in the combination, with a rotary table and mechanismfor reciprocating it, of the hollow ware filled with a grindingsubstance, and a ringon the upper edge of said ware; twelfth, in thecombination, with-a rotary table, mechanism for reciprocating it, andthe hollow ware filled with a grinding substance, of a ring resting onthe upper edge of the ware and a plate fitted therein thirteenth, in thecombination, with a rotary table, mechanism for reciprocatin g it, andthe hollow ware filled with a grinding substance, of a ring resting onthe upper edge of the ware, and a vertically-adjustable holder adaptedto maintain said ring in position fourteenth, in the combination, with aring adapted to rest on the upper edge of the hollow ware, of avertically-adjustable holder having radial arms, the extremities of thelatter being provided with depending lugs and means for adjusting themto or from the center of said ring-holder.

Referring to the drawings, Figure 1 is a view, in perspective, of amachine embodying the invention and representing a piece ofhollow warein position thereon. Fig.2 is a vertical transverse section passingthrough the hollow ware.

Fig. 3 is a detail view of that portion of the machine which embracesand supports the hollow ware in position.

A rotary table, A, adapted to support the hollow ware, is connected witha pitman, B, whose opposite extremity is connected to a balance-wheel,O, the latter being mounted on vertical shaft D, adapted to be actuatedin continuous rotary movement by any suitable means.

The length of stroke of the pitman is such as to cause the rotary tableto be moved only partly about its vertical axis, and hence it isactuated in a reverse or alternating rotary movement.

The bed of the table is provided with two lateral projections, a,respectively, 011 opposite sides thereof, each projection being adaptedto strike against two elastic stops, 12, secured to the frame of themachine, and located, respectively, on opposite sides of saidprojection. Against these stops the table has impact at the terminationof its movement in each curved line of direction, the two projectionssimultaneously striking their appropriate stops as the pitman reachesthe end of each stroke. A twofold purpose is thereby attained. Theelastic stops serve as recoil-motors, to urge the table in the oppositedirection to that in which it is traveling when it comes in contact withthe stops, and the pitman is relieved of strain, which otherwise wouldfall thereon. The upper portion of the table is provided with a two-partclamp, E, one part thereof being secured in stationary position on thetable, the other portion being free to move in a horizontal direction.The meeting ends of the two parts of the clamp on one side of the tableare hinged together. The meeting ends on the opposite side of the tableare provided with a fastening device, 0. A two-part ring, F, is looselyfitted on the clamp by means of setscrews or headed projections d andslots e, the lower portion of the screws or headed projections beingheld in suitable holes in the clamp, and the upper portion fitting insaid slots in the rings. By this arrangement rings with different insidediam eters can be quickly changed on said clamp to fit closely differentsizes of hollow ware.

The clamp, with its ring, serves not only to maintain the hollow warefirmly in position, but they also brace and support it, so that there isno tendency to break the hollow ware while it is being subjected to thequick reversing movement.

In order to completely fill the hollow ware with grinding substance, soas to grind the extreme end portion of said ware, it is provided with aring, G, which rests on its upper .edge. A holder, H, is connected to arod, K,

adapted to have sliding movement in vertical bearings L. This holder isformed with radial arms from the extremities of which depend lugs g,which embrace ring G. These lugs are adapted by slot-and-set-screwdevice h to be adjusted to or from the center of the holder, so as tofit different sizes of rings, corresponding to the diameter of thehollow ware. Within this ring, and resting on the grinding mass M, isplaced a plate, N. This plate may be heavy or weighted, so as to causethe grinding mass to act the more severely upon the interior surface ofthe hollow ware. It further serves to prevent any portion of thegrinding substance from escaping from the hollow ware; and it alsoprevents a great proportion of the dust generated within the hollow warefrom arising therefrom.

To the bed of the rotary table is secured a tubular shaft, P, whichextends downward through suitable bearings R. It serves as the axis ofthe table, and maintains the latter intrue position. Through this shaftpasses a rod, S, the upper extremity of which is provided with a plate,T, and the lower extremity with a foot-lever, W. By-vertically adjustingthis plate the hollow ware is supported thereon while the clamp and itsconnecting-ring are being fitted about said ware, as different sizes ofthe latter may be placed on the machine; also, in removing the finishedhollow ware the latter is raised by said plate, so as to permit it to bereadily taken from the clamp by the operator. a

To operate the machine, the vertically-adjustable holder H is raised andmaintained in such position by any suitable means. The clamp is opened,and the hollow ware is placed therein. The plate T is raised, so thatthe ware rests thereon, and the latter is suitably adjusted within theclamp and its connectingring. The ring G is then fitted on top of theIIO hollow ware, and holder H is lowered so as to embrace it. Thenthehollow ware is filled with any suitable grinding substance. Holder H isagain raised, to permit plate N to be placed in position on the grindingsubstance. It is then lowered, and the machine is started.

"It is apparent that quite a number of these machines may be attended toin operation by a single person, and the labor connected with suchattention is slight.

The grinding material is cheap, and it is saved by sifting, so as to beused in many successive operations,thcreby effecting its entireutilization.

The mechanical parts of the invention are simple, and adapted toaccomplish their respective functions quickly and readily.

In the foregoing description we have set forth the specific mechanismemployed by us; but we do not restrict ourselves to such detailconstruction, inasmuch as substitutions, changes, and omissions of partsmay be made therein, provided the essential features of invention setforth in the following claims are employed.

Having fully described our invention, what we claim as new, and desireto secure by Letters Patent, is

l. A process of grinding and polishing hollow ware, consisting infilling said ware with a grinding substance and reciprocating the warein rotary movement, so as to cause the grinding mass to tend to remainstationary within the moving ware, substantially as set forth.

2. In a grinding and polishing machine, the combination, with a rotarytable adapted to support the hollow ware, of mechanism whichreciprocates said table, substantially as set forth.

3. In a grinding and polishing machine, the combination, with a rotarytable adapted to support the hollow-ware and mechanism for reciprocatingit, of an elastic stop which receives the impact of said table at thetermination of its movement in one line of direction, substantially asset forth.

4. In a grinding and polishing machine, the combination, with a rotarytable adapted to support the hollow ware, said table being provided withone or more lateral projections, of mechanism which reciprocates thetable, and elastic stops located, respectively, on opposite sides ofeach projection in position to receive the impact thereof, substantiallyas set froth.

5. In a grinding and polishing machine, the combination, with a rotarytable and mechanism for reciprocating it, of a clamp connected to saidtable and adapted to secure the hollow ware thereon, substantially asset forth.

6. In a grinding and polishing machine, the combination, with a rotarytable and mechanism for reciprocating it, of a two-part clamp connectedto the table and adapted to embrace the hollow ware, the two. parts ofsaid clamp being hinged together at one side, and proa clamp, of atwo-part ring fitted on the latter and directly supporting the hollowware, said ring being provided with slot or slots and screw or headedconnection with the clamp, so as to allow of the ring being changedthereon, substantially as set forth.

9. In a grinding and polishing machine, the combination, with a rotarytable provided with an adjustable clamp for maintaining different sizesof hollow ware in position, of a vertically-adjustable support adaptedto hold said ware in position while being clamped, substantially as setforth.

10. In a grinding and polishing machine, the combination, with a rotarytable provided with a tubular shaft extending downward through suitablebearings, of an internal rod, a plate secured to the upper extremity ofthe latter, and a lever connected to the lower extremity of the same,substantially as set forth.

11. In a grinding and polishing machine, the combination, with a rotarytable and mechanism for reciprocating it, of the hollow Ware filled witha grinding substance, and a ring fitted on the upper edge of said ware,substantially as set forth.

12. In a grinding and polishing machine, the combination, with a rotarytable, mechanism for reciprocating it, and the hollow ware filled with agrinding substance, of a ring resting on the upper edge of the ware anda plate fitted therein, substantially as set forth.

13. In a grinding and polishing machine, the combination, with a rotarytable, mechanism for reciprocating it, and the hollow ware filled with agrinding substance, of a ring resting on the upper edge of the ware, anda verticallyadjustable holder adapted to maintain said ring in position,substantially as set forth.

14. In a grinding and polishing machine, the combination, with a ringadapted to rest on the upper edge of the hollow ware, of averticallyadjustable holder having radial arms, the extremities of thelatter being provided with depending lugs and means for adjusting themto or from the center of said ring-holder, substantially as set forth.

In testimony that we claim the foregoing we have hereunto set our handsand seals this 2d day of February, 1880.

WILLIAM W. LAKE. [L. s. MARVIlfT E. WELLER.

Witnesses ALEX. IVIURRAY, GEORGE SNYDER.

support the ware, sub

